Metallo-dielectric core-shell nanospheres as building blocks for optical 3D isotropic negative-index metamaterials

Physics – Optics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16 pages, 7 figures

Scientific paper

Materials showing electromagnetic properties that are not attainable in naturally occurring media, the so called metamaterials, have been lately, and still are, among the most active fields in optical and materials physics and engineering. Among those properties, one of the most attractive is the sub-diffraction resolving capability predicted for media having index of refraction of -1. Here we propose a fully 3D, isotropic metamaterial with strong electric and magnetic responses in the optical regime, based on spherical metallo-dielectric core-shell nanospheres. The magnetic response stems from the lowest, magnetic-dipole resonance of the dielectric shell with high refractive index, and can be tuned to coincide with the plasmon resonance of the metal core, responsible for the electric response. Since the response does not originate from coupling between structures, no particular periodic arrangement needs to be imposed. Moreover, due to the geometry of the constituents, the metamaterial is intrinsically isotropic and polarization independent. It could be realized with current fabrication techniques with materials such as Silver (core) and Silicon or Germanium (shell). For these particular realistic designs, the metamaterials present negative index in the range within 1.2-1.55 microns.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Metallo-dielectric core-shell nanospheres as building blocks for optical 3D isotropic negative-index metamaterials does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Metallo-dielectric core-shell nanospheres as building blocks for optical 3D isotropic negative-index metamaterials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallo-dielectric core-shell nanospheres as building blocks for optical 3D isotropic negative-index metamaterials will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-320336

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.